What is the 20th term of the arithmetic sequence 4, –2, –8, … ?

Question

anonymous · Answer

ummm.?

anonymous · Answer

Answer
		–122
		–128
		–110
		–116
those are my choices with ur number im not getting any of them

anonymous · Answer

4 - (20 - 1) * 6 = -110 .

hero · Answer

That is correct

anonymous · Answer

-110

anonymous · Answer

can someone explain how its done?

hero · Answer

Yeah, tnsgod, what's the general formula?

hero · Answer

Okay, I think I got it: Start with the first term, subtract (number for terms minus 1) multiply it by the distance between the terms

anonymous · Answer

Well, 4 is the first term and each subsequent term is 6 less than the one before. Therefore:

ith Term = 4 - (i - 1) * 6

anonymous · Answer

if you subtract 6 from 4 20 times.. you'll have -110.
4-6 = -2
-2-6 = -8
-8-6 = -14
etc.